Which cast is indicated for tibia and fibula affections with open wound, swelling, and infection in the long-leg form?

• A. Short Leg Posterior Mold
• B. Cylinder Mold
• C. Long Leg Posterior Mold
• D. Delvit Cast

Answer: (C)

When a tibia and fibula injury presents with an open wound, swelling, and infection, the immobilization should protect the fracture while allowing for edema to subside and the wound to be monitored. A long-leg cast accomplishes this by spanning from the thigh to the foot, which stabilizes the knee and ankle and helps maintain proper alignment during healing.

Using a posterior mold (posterior slab) with the long-leg cast is ideal in this situation. The posterior portion provides a space that accommodates edema and reduces pressure on the anterior leg where swelling is often greatest, making the cast more comfortable and safer for the injured tissues. It also allows easier wound inspection, drainage access, and adjustments if swelling changes, without compromising immobilization.

In contrast, a short leg cast wouldn’t control knee movement and could fail to manage swelling adequately; a cylinder mold describes a general casting method not specifically tailored to accommodate significant swelling or an open wound; and the Delvit approach is a different technique not as well suited for this combination of injury and soft-tissue concerns.